Where does “Alexius” come from?

Alexius (Latin) comes from Ancient Greek Ἄλεξις, from Ancient Greek ᾰ̓λέξω, from Proto-Indo-European h₂lek-s-.

Ancestry of “Alexius”, step by step

StepLanguageWordMeaning
1Ancient GreekἌλεξιςhelper, defender
2Ancient Greekᾰ̓λέξωI ward off; ward off
3Proto-Indo-Europeanh₂lek-s-—

Words derived from “Alexius”

Every word from Proto-Indo-European h₂lek-s- →Every word from Ancient Greek ᾰ̓λέξω →Every word from Ancient Greek Ἄλεξις →
Alexius — Etymology, Origin & Word History | Etymology Explorer